Now that we know social media is an effective place to kick-start activism, it should come as no surprise that the London-based cervical cancer organization Jo’s Cervical Cancer Trust is taking to Instagram to raise awareness about the disease in young women in the U.K.

Their challenge is called #SmearforSmear. The goal is to get young Brits to start scheduling annual pap smears to detect any potential signs of cervical cancer in its earliest stage. Because believe it or not, the most recent figures show a rise in the number of diagnosed cases for women aged 25-29, according to the Royal College of Obstetricians & Gynaecologists.

The social campaign comes during Cervical Cancer Prevention Week (January 25-31). That means you’ve got one more day to participate! All it takes is your normal application of lipstick, a quick smear with your fingers, and a good selfie to capture the look.

Get a glimpse of some It Brits who have accepted the #SmearforSmear challenge for inspiration:

Swipe through your timelines to see which celebrity will be next to participate in the #SmearforSmear challenge, then swipe on a lipstick of your own and give it a smudge.